Ticket #34406: 34406.diff

wp-includes/kses.php

@@ -927 +927 @@
                 switch ($mode) {
                         case 0 : // attribute name, href for instance
 
-                                if ( preg_match('/^([-a-zA-Z:]+)/', $attr, $match ) ) {
+                                if ( preg_match('/^([-_a-zA-Z0-9:]+)/', $attr, $match ) ) {
                                         $attrname = $match[1];
                                         $working = $mode = 1;
-                                        $attr = preg_replace( '/^[-a-zA-Z:]+/', '', $attr );
+                                        $attr = preg_replace( '/^([-_a-zA-Z0-9:]+)/', '', $attr );
                                 }
 
                                 break;